Hardcover editions of the eleven novels of Phyllis Paul (1903-1973) are increasingly elusive, and increasingly costly. All eleven came out in British editions, while four appeared in hardcover in the U.S. These four include her first novel, We Are Spoiled (William Morrow, 1934), and three of her later and more characteristic novels, Twice Lost (1960), A Little Treachery (1962), and Pulled Down (1965), all published by W.W. Norton. Two of these latter titles achieved publication in U.S. mass market paperback editions, though one was retitled. These paperbacks serve nowadays as more affordable reading copies for those interested in sampling Phyllis Paul.
The paperback publisher was Lancer Books of New York, a firm founded in 1961 which went bankrupt in September 1973. Lancer Books is notable for its many science fiction and fantasy titles, including Robert E. Howard's Conan stories.
In 1966, Lancer launched a series of Lancer Gilt-Edge Gothics, presumably so-called because of the gold-colored edges on the books. The first two books in this series were by Phyllis Paul, Twice Lost and Echo of Guilt, the latter being a retitled edition of Pulled Down.
Here are the covers of these two books. Note the glowing reviews from the Springfield Republican on the rear cover of each book. And note the series numbering (1 and 2) near the top of the spine. The cover art is uncredited.
Twice Lost had a second printing in March 1973, some months before Lancer's bankruptcy. Here it is just labelled a Lancer Gothic, though the page count is much higher than in the 1966 printing because of the larger font used in the "Easy Eye" series.